How to perform data migration in SQL Server?

There are several common methods for data migration in SQL Server.

1. SQL Server’s built-in import and export tool, SQL Server Management Studio (SSMS), provides a data import and export wizard that makes it easy to migrate data from one database to another. You can choose to migrate the entire database or select individual tables, views, or query results for migration.
2. You can utilize SQL Server Integration Services (SSIS) for data migration tasks, using its advanced data transformation and processing capabilities to move data from one database to another or a data warehouse within SQL Server.
3. Using the replication feature in SQL Server allows for real-time synchronization of data across different database servers. By setting up publishers, distributors, and subscribers, data can be synchronized between different servers.
4. Using the BCP command line tool: BCP is a command line tool provided by SQL Server that can be used to export data to a file or import data into a database. You can use the BCP command to export data to a text file and then import it into another database.
5. Utilize SQL Server backup and restore feature: You can backup the entire database to a file using SQL Server’s backup and restore feature, and then restore the database on another server. This method is suitable for migrating the entire database.

The above are some commonly used methods, the specific method chosen depends on the specific requirements and circumstances of the data migration. When choosing a specific method, factors such as data volume, data complexity, migration speed, etc., need to be considered.